The United States and the Soviet Union had many conflicting views and beliefs. In the form of government, this presented itself as the United State's wanting a democratic, limited government, whereas the Soviet Union was all for a communist dictatorship. The Soviet Union had control over much of Europe which meant so did communism. The US came up with plans for the containment of communism as they did not want it to spread. To enforce their ideas, they deemed it necessary to get involved in the Korean War. Another reason being that Korea had been partitioned between the USSR and the UN after its retrieval from Japan, so the US was already involved with South Korea. As I mentioned before however, this wouldn't end well with the US and USSR in a passive aggressive competition with one another and conflicting perspectives.